…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#127669 (Fix the issue of invalid suggestion for a reference of iterator)
 - rust-lang#127707 (match lowering: Use an iterator to find `expand_until`)
 - rust-lang#127730 (Fix and enforce `unsafe_op_in_unsafe_fn` in compiler)
 - rust-lang#127789 (delete #![allow(unsafe_op_in_unsafe_fn)] in teeos)
 - rust-lang#127805 (run-make-support: update gimli to 0.31.0)
 - rust-lang#127808 (Make ErrorGuaranteed discoverable outside types, consts, and lifetimes)
 - rust-lang#127817 (Fix a bunch of sites that were walking instead of visiting, making it impossible for visitor impls to look at these values)
 - rust-lang#127818 (Various ast validation simplifications)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#127805 - Mrmaxmeier:run-make-bump-gimli, r=jieyouxu

run-make-support: update gimli to 0.31.0

This version bump is required for the tests in rust-lang#126985 as suggested [here](rust-lang#126985 (comment)).

r​? tgross35
(^ that didn't work. cc `@tgross35)`

try-job: x86_64-msvc
try-job: x86_64-mingw
try-job: aarch64-apple
try-job: test-various
try-job: armhf-gnu
try-job: dist-x86_64-linux